170 BOTANY. 



Helianthella unifloea, T. & Gr. Pubescent with short appressed 

 hairs, and somewhat hirsute along the stem ; leaves broadly lanceolate, 4^6 

 long, 1-2' wide pointed, narrowed at the base, mostly opposite, the lower 

 ones petioled, all 3-nerved above the base, heads sohtary or with 1-2 from 

 the upper axils, 2-4' broad ; involucre ciliate-hirsute, the scales lanceolate, 

 foliaceous, the outer ones often exceeding even the rays; chaff of the shghtly 

 convex receptacle closely condupKcate, 5-7" long, delicately scarious, pubes- 

 cent at the tip ; achenia 2-winged, ciliate and pubescent, crowned with 2 

 long awns and about 4 intermediate lacerate squamellee. — Stems 2-3° high, 

 usually single from a rather slender perennial caudex ; rays pale yellow ; disk 

 an inch or more broad. Along the Rocky Mountains from Montana to Colo- 

 rado and Arizona; Utah, (Woodhouse.) Bear Eiver Canon, Utah; 8,000 

 feet elevation; July. (604.) 



Helianthella multicaulis. Somewhat scabrous and pubescent with 

 minute scattered appressed hairs ; stems li° high, many from a stout branch- 

 ing woody base ; leaves opposite, oblong-lanceolate, 3-4' long, 7-10" wide, 

 rather obtuse, nearly sessile, 3-nerved above the base, minutely resinous- 

 dotted ; heads solitary, long-peduncled, 2-3' broad ; involucral scales lanceo- 

 late, puberulent and ciliate, the outer ones sometimes exceeding the rays ; 

 chaff of the receptacle conduplicate, 4" long, rigidly chartaceous, the tips 

 scarcely pubescent ; achenia as in the last, but not so large. — Very near the 

 last, but distinguished from it by the numerous stems rising from a stout 

 underground woody caudex, which lasts many years, by the resin which fills 

 the ultimate veinlets and appears on both surfaces of the leaves in exceed- 

 ingly minute granules, and by the smaller and much more rigid chaff of 

 the receptacle. Wyeth's specimen of Nuttall's Helianthus uniflorus has the 

 smaller leaves of this plant, but the chaff is large and scarious as in the 

 plant last described. East Humboldt Mountains, and on the hills and peaks 

 about Parley's Park, Utah ; Jime, July. (605.) 



Heliomeris^ multifloea, Nutt. Jour. Acad. Phil, n. s., 1. 171. 

 Stems few from a woody root, 1-2° high, simple or branched ; leaves nar- 



' HELIOMEEIS, Nutt., I. c. Heads mauy-flowerecl, radiate ; rays neutral ; disk-flowers numerous, 

 perfect ; the corolla with a very short pubescent proper tube, (i. e., ampliated very near the base,) 5- 

 toothed. luvolucre spreading ; oblong4iuear scales in about 2 rows. Eeceptaole oblong-conical, covered 

 with persistent lanceolate concave-carinate chafl', partly embracing the disk-flowers and nearly their 

 length. Stamens with broad ovate appendages and blackish anthers. Branches of the style oblong- 

 clavate, slightly hispid. Achenia cuneate-oblong, compressed-riuadrangular, entirely destitute of pap« 

 pus. —Perennial Western North American herbs or suffrutescent plants, with nearly entire mostly opposite 

 leaves and yellow flowers, smaller than those of most SelianihL 



